C#调用CMD命令后显示命令后信息

private   void   button1_Click(object   sender,   EventArgs   e)
{
try
{
Process   p   =   new   Process();
p.StartInfo.FileName   =   "cmd.exe ";
p.StartInfo.UseShellExecute   =   false;
p.StartInfo.RedirectStandardInput   =   true;
p.StartInfo.RedirectStandardOutput   =   true;
p.StartInfo.RedirectStandardError   =   true;
p.StartInfo.CreateNoWindow   =   true;
p.Start();
p.StandardInput.WriteLine( "ping   172.16.1.1 ");
p.StandardInput.WriteLine( "exit ");
string   strRst   =   p.StandardOutput.ReadToEnd();
p.WaitForExit();
this.label1.Text   =   strRst;
}
catch   (Exception   err)
{
MessageBox.Show(err.Message);   //显示错误信息。
}
}